A/T - Fluid Leak Near Governor Area Caused By Porosity
89buick13Bulltin 89-7440-13
Date Sept. '89
Ref. No. 89-208-7440
Corp. Ref. No. 977130
Figure 1 - Fluid Leak Area Caused By Porosity:
SUBJECT: FLUID LEAK NEAR GOVERNOR AREA CAUSED BY POROSITY
MODELS AFFECTED: 1989 REGAL, CENTURY AND RIVIERAS
BULLETIN COVERS (Figure 1)
A fluid leak near the governor area on a 1989 Regal, Century, Electra or Riviera equipped with a THM 440-T4/HYDRA-MATIC 4T60 may be caused by porosity allowing fluid to seep out of the case.
Figure 2 - Inspect For Case Die # 567:
SERVICE PROCEDURE (Figure 2)
If the transaxle has a leak near the governor area, inspect the case die number as shown in Figure 2. If the die number is 567 and the VIN is within the following breakpoints listed under "Vehicles Involved", then replace the transaxle case.
SERVICE PARTS INFORMATION
Part Number Description Model Year Model Usage
8662928 Pkg., Transaxle Service 1989 All
Case Assembly Complete
Parts are currently available from GMSPO.
SERVICE MANUAL REFERENCE
Refer to the appropriate 1989 Service Manual for proper procedures.
VEHICLES INVOLVED
Involved are certain cars built within the following VIN breakpoints:
Model Assembly
Year Model Body Car Line Plant From Through
1989 Buick E Riviera Hamtramck KU418301 KU419540
1989 Buick A Century Framingham KG412549 KG413122
1989 Buick A Century Oklahoma Qty K6427386 K6429870
1989 Buick W Regal Oshawa # 2 K1470258 K1470941